A quality pencil sharpener is a vital accessory for anyone who uses woodcase pencils regularly. Like any blade they blunt over time and should be replaced if you find that there's resistance to turning or if they keep breaking leads. Many KUM sharpeners feature replaceable blades. We have a great range of sharpeners starting at under £1 and going up to expensive luxury desk sharpeners, but even the cheapest is excellent quality. We also have left-handed sharpeners; sharpeners for larger pencils; and that peculiar category of sharpeners for 2mm or larger leads, known as lead pointers.
The most basic sharpeners are used over a waste bin, but for a little more money you get the canister sharpeners that hold their own waste until you're ready to empty them.
The ultimate pencil sharpener here is the KUM Automatic AS2, which sharpens in two stages: first the wood, then the lead. For the power user, try a desk sharpener.